Portable mortar-mixer.



M. D. PRATT.

PORTABLE MORTAR MIXER.

APPLICATION FILED JULY 9, 1910.

1,098,400; Patented June 2, 1914.

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M. D. PRATT.

PORTABLE MORTAR MIXER.

APPLICATION FILED JULY 9, 1910.

Patented June 2, 1914.

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MASON I). PRATT, 0F HARRISBURG, ".EENNSYLVANIA.

PORTABLE IVIORTAR-MIXER.

To all 'whom it may concern Be it known that l, Mason D. PRATT, acitizen of the United States, and resident. of Harrisburg, county ofDauphin, State of Pennsylvania, have invented certain new and usefulImprovements in Portable Mortar- Mixers, of which the following is aspecilication.

The objects of this invention are to produce a convenient apparatus formixing and transporting concrete, mortar, or o-ther substances, and moreparticularly to produce an apparatus by means of which the ingredientsof cement mortar may be mixed while in transit to the place where themortarl is required and discharged from the mixer at a plurality ofpoints, as may be necessary in building walls, casting cement pipe, orproducing other elongated structures.

The invention will be described in connection with the accompanyingdrawing, in which,-

Figure 1 is a side view partly in section of an apparatus embodying myinvention; Fig. 2 is a plan of the valve controlling tho outlets; Fig. 3is an end view of the apparatus; Fig. 4 is a detail.

ltet'erring to the drawings, l() indicates a beam which may be suspendedfrom a derrick or elevated carrier by means of a suit able connection 11attached at or near the middle of the beam. The receptacle 12 whichconstitutes the mixer is preferably cylindrical and closed at its endsby suitable plates 13. This cylindrical receptacle is mounted in tworings lil suspended from the beam 1() by rods or links 15, as shown forinstance in Fig. 3. The rings preferably have openings at their lowersides, their separated ends being adjustably connected by means of bolts16. Each ring consists of two annular plates between which the bolts 1Gare mounted. Between these plates are also mounted a series of grcovedwheels 17 in which the receptacle 12 turns. The receptacle is preferablyprovided with annular rails 18 which rest in the grooves of the wheels17. By means of the bolts 16 the rings 14 may be adjusted so that thereceptacle 12 will turn freely in them, but without lost motion. Therings 14 are necessarily of considerably greater radius than thereceptacle 12, which would interfere with bringing the receptacle closeto a mold, but by breaking away the lower parts of the rings Specicatonof Letters Patent.

Application filed July 9, 1910.

Patented June 2, 1914.

serial No. 571,244.

and introducing the bolts 16 the bottom of the receptacle can be broughtmuch closer to a mold or trench in to which the mortar or concrete is tobe discharged. The bolts furthermore interfere in a less degree with theoutlet openings, to be hereinafter described, than would the rings ifcarried across the bottom of the mixer.

In Figs. 1 and 3 the rotary receptacle 12 is shown in the position inwhich it is adapted to be charged and discharged and for the purposes ofthis specification this may be assumed to be its normal position. Uponthe upper side of the receptacle are a series of openings 19 providedwith covers 2O and with bolts or screws :tor securely fastening thecovers in place to close the openings and prevent leakage when thereceptacle is rotated. As shown in Fig. 4, the cover 20' is providedwith an eye 21 at one side for one of the bolts and with a hooi; 22 atthe opposite side for another bolt. By loosening the bolts the cover maybe swung about the eye 21 without disconnecting it from the receptacle.

At the bottom of the receptacle are a series of openings 23, preferablyarranged in a single straight line parallel with the axis of thecylinder and a sliding rod 24 having a corresponding series of openingsis connected with the outer surface of the receptacle and adapted tosinniltaneously open or close the discharge openings 23. As shown thevalve rod 24 is mounted in stirrups 25 which are suitably attached tothe exterior of the cylinder and which hold the valve rod snugly againstthe wall of the cylinder, as shown in Fig. l. The valve rod 24g may beoperated in any suitable way; as shown it is adapted to be reciprocatedby means of a lever 27 pivoted on one end of the receptacle and havingan arm engaging the rod. lf desired a second lever 28 may be mounted onthe other end of the receptacle and also connected with the valve rod inany suitable manner.

@n the inner wall of the receptacle 12 are securely attached a series ofinwardly projecting plat/es or paddles 29, preferably arranged incircumferential rows, the paddles of each row being inclined in oppositedirections.` whereby the materials are moved backward and forwardlengthwise of the receptacle when the latter is rotated, and thus thor--oughly mixed.

I provide suitable means for rotating the mixer either while it isstationary or during transit from one point to the other. As illustratedin the drawing, an electric mot-or 30 is mounted on a platform 31 andconnected by suitable gearing with a sprocket. wheel 32 upon a. shaft 33which is mounted in bearings on the platform or upon the beam 10. Asuitable sprocket chain 34; connects the sprocket wheel 32 with atoothed ring 35 secured on the receptacle 12. The rotary movement of themixer l2 may therefore be controlled by controlling the movements of themotor in the usual manner.

In operating the mixer, the water, cement, sand and gravel or otheringredients may be introduced dry and the required amount of water theninjected. The mixer is designed to be closed tightly when in operationto prevent leakage of water or other materials. To preventthe formationof a vacuum when discharging the contents, and to thereby promote a freedischarge, I provide an air inlet, which is preferably controlled by thevalve plate 24. As shown there is an air pipe 36 extending across themixer chamber and having one end screwed into one of the outlet openings23 and adapted to be opened and closed by the valve plate 24. Theopposite end of the pipe 36 is in communication with the interior of themixer and is sustained by a suitable bracket 37. As shown the air inletpipe extends diametrically across the mixer, its o pen end being nearthe upper wall of the mixer when the outlet openings 23 are at thebottom.

I provide handles 3S centrally arranged on the ends of the mixerreceptacle as a convenient means for the workmen to guide the mixer andaline its discharge openings with the mold to be filled. In order thatthe mixer may be handled while the receptacle is rotating, these handlesare preferably arranged to turn freely upon studs 39 connected with theend plates. Then the proper amounts of the various ingredients have beenintroduced the rot-ation of the mixer may be started and may becontinued while it is being transported from the charging location tothe place where the mortar or concrete is to be deposited. In this wayno time is lost in transferring the material. It will be understood thatthe various closures for the mixer receptacle are to be water tight sothat thin mortar can be mixed if desired. The present apparatus isparticularly intended for the mixing of thin cement mortar, although ofcourse it is adapted for various other mixtures.

Having described my invention what I claim and desire to secure byLetters-Patent is,

l. A portable mortar mixer comprising a suitable beam and means forsuspending the same, rings supported from the beam, a mixing receptacleArotatably mounted in said rings, a motor supported upon the beam andmeans connecting the motor with the receptacle to rotate the latter.

2. A rotary mixer comprising an over head support, a plurality of ringsdepending from said support, wheels carried by said rings, a receptacleprovided with annular tracks engaging said wheels, and means wherebysaid rings may be expanded or contracted.

3. A rotary mixer comprising an overhead support, a plurality of ringsdepending from said support, wheels carried by said rings, and areceptacle provided with annular tracks engaging said wheels, said ringsbeing open at one side and having their adjacent ends adjustablyconnected by suit-able means.

4. A concrete mixer comprising a rotary receptacle, an air inlet pipewithin the receptacle and having one end communicating with the outsideair at one side of said receptacle and the other end arranged near theinner wall of the receptacle at. the other side thereof, for the purposeset forth.

5. A concrete mixer comprising a rotatable receptacle having a dischargeopening and an inlet opening, and a common valve controlling both ofsaid openings, whereby air is admitted to the mixer when the dischargevalve is opened.

6. In a portable mortar mixer, the combination of a portable supportingbeam, a rotatable mixing receptacle, pairs of members suspended from thebeam and curved around the receptacle, rails on the mixing receptacle,rollers disposed between the curved members and rails, said rollersrotatably supporting said receptacle, a motor mounted on said beam, andmeans connecting the motor with the receptacle to rotate the latter.

In testimony whereof I atlix my signature in presence of two witnesses.

MASON D. PRATT.

Vfitnesses GRACE M. HARCLERODE, C. G. Froxns.

Copies of this patent may be obtained for ve cents each, 'by addressingthe Commissioner of Patents, Washington, D. C.

